Trephine



FIG. 1 is a perspective view of a trephine in accordance with the present invention;

FIG. 2 is a side elevation of the trephine of FIG. 1;

FIG. 3 is a top elevation of the trephine of FIG. 1;

FIG. 4 is a right elevation of the trephine of FIG. 1;

FIG. 5 is a bottom elevation of the trephine of FIG. 1;

FIG. 6 is a front view of the trephine of FIG. 1; and,

FIG. 7 is a rear view of the trephine of FIG. 1.

The trephine is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design. 

CLAIM The ornamental design for a trephine, as shown and described. 